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Water Systems

Transboundary Aquifers and Groundwater Systems of Small Island Developing States: Status and Trends
UNESCO-IHP led the execution of the global Assessment of Transboundary Aquifers and Small Island Developing States (SIDS) Groundwater Systems. The TWAP Groundwater Assessment was carried out jointly with a network of partners at national, regional and international level.
Transboundary Lakes and Reservoirs: Status and Trends
The International Lake Environment Committee Foundation (ILEC) is leading the assessment of Transboundary Lake and Reservoir Basins.
Transboundary River Basins: Status and Trends
The ecosystem services provided by the world's transboundary river basins support the socioeconomic development and wellbeing of the world’s population. These basins, which cover most of the earth’s land surface, continue to be impacted and degraded by multiple and complex human-induced and natural stressors that threaten the sustainability of these river systems and, in turn, human survival and well-being. Further, management of transboundary waters is increasingly becoming constrained by limited availability of funds, resulting in the need for better prioritization of the allocations of limited financial resources.
Large Marine Ecosystems (LMEs): Status and Trends
The Intergovernmental Oceanographic Commission (IOC) of UNESCO is leading the assessment of Large Marine Ecosystems (LMEs).
Open Ocean
The Intergovernmental Oceanographic Commission (IOC) of UNESCO is leading the thematic assessment of the Open Ocean.






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